18090672902 has 4 divisors (see below), whose sum is σ = 27136009356. Its totient is φ = 9045336450.

The previous prime is 18090672877. The next prime is 18090672907. The reversal of 18090672902 is 20927609081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20927609081 = 23 ⋅909896047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090672907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4522668224 + ... + 4522668227.

It is an arithmetic number, because the mean of its divisors is an integer number (6784002339).

Almost surely, 2^18090672902 is an apocalyptic number.

18090672902 is a deficient number, since it is larger than the sum of its proper divisors (9045336454).

18090672902 is an equidigital number, since it uses as much as digits as its factorization.

18090672902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045336453.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 18090672902 in words is "eighteen billion, ninety million, six hundred seventy-two thousand, nine hundred two".